from django.db import models

class Author(models.Model):
    """作者模型"""
    name = models.CharField(max_length=100)
    age = models.IntegerField()
    email = models.EmailField()

    class Meta:
        db_table = 'front_author'

class Publisher(models.Model):
    """出版社模型"""
    name = models.CharField(max_length=300)

    class Meta:
        db_table = 'front_publisher'

class Book(models.Model):
    """图书模型"""
    name = models.CharField(max_length=300)
    pages = models.IntegerField()
    price = models.FloatField()
    rating = models.FloatField()
    author = models.ForeignKey(Author, on_delete=models.CASCADE)
    publisher = models.ForeignKey(Publisher, on_delete=models.CASCADE)

    class Meta:
        db_table = 'front_book'

class BookOrder(models.Model):
    """图书订单模型"""
    book = models.ForeignKey(Book, on_delete=models.CASCADE)
    price = models.FloatField()

    class Meta:
        db_table = 'front_book_order'